老师,获取到最新的代码，却提示不存在包dart:ui,异常信息如下所示:
开发平台为: windows11

/D:/sdk/flutter/packages/flutter/lib/src/material/animated_icons.dart:9:8: Error: Dart library 'dart:ui' is not available on this platform.
import 'dart:ui' as ui show Canvas, Paint, Path, lerpDouble;
       ^
Context: The unavailable library 'dart:ui' is imported through these packages:

    package:flutter_bili_app => package:flutter => dart:ui
    ...

Detailed import paths for (some of) the these imports:

    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/assertions.dart => package:flutter/src/foundation/diagnostics.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/assertions.dart => package:flutter/src/foundation/diagnostics.dart => package:flutter/src/foundation/debug.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/binding.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/binding.dart => package:flutter/src/foundation/assertions.dart => package:flutter/src/foundation/diagnostics.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/binding.dart => package:flutter/src/foundation/assertions.dart => package:flutter/src/foundation/diagnostics.dart => package:flutter/src/foundation/debug.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/binding.dart => package:flutter/src/foundation/debug.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/change_notifier.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/change_notifier.dart => package:flutter/src/foundation/assertions.dart => package:flutter/src/foundation/diagnostics.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/change_notifier.dart => package:flutter/src/foundation/assertions.dart => package:flutter/src/foundation/diagnostics.dart => package:flutter/src/foundation/debug.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/change_notifier.dart => package:flutter/src/foundation/diagnostics.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/change_notifier.dart => package:flutter/src/foundation/diagnostics.dart => package:flutter/src/foundation/debug.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/change_notifier.dart => package:flutter/src/foundation/memory_allocations.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/change_notifier.dart => package:flutter/src/foundation/memory_allocations.dart => package:flutter/src/foundation/assertions.dart => package:flutter/src/foundation/diagnostics.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/change_notifier.dart => package:flutter/src/foundation/memory_allocations.dart => package:flutter/src/foundation/assertions.dart => package:flutter/src/foundation/diagnostics.dart => package:flutter/src/foundation/debug.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/change_notifier.dart => package:flutter/src/foundation/memory_allocations.dart => package:flutter/src/foundation/diagnostics.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/change_notifier.dart => package:flutter/src/foundation/memory_allocations.dart => package:flutter/src/foundation/diagnostics.dart => package:flutter/src/foundation/debug.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/debug.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/diagnostics.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/diagnostics.dart => package:flutter/src/foundation/debug.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/key.dart => package:flutter/src/foundation/diagnostics.dart => dart:ui
    package:flutter_bili_app/main.dart => package:flutter/material.dart => package:flutter/src/material/about.dart => package:flutter/foundation.dart => package:flutter/src/foundation/key.dart => package:flutter/src/foundation/diagnostics.dart => package:flutter/src/foundation/debug.dart => dart:ui
    ...

/D:/sdk/flutter/packages/flutter/lib/src/material/app.dart:5:8: Error: Dart library 'dart:ui' is not available on this platform.